From tnakamura@pacbell.net Sun Oct 09 10:30:33 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pacbell!tnakamura From: tnakamura@pacbell.net (Takeshi Nakamura) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct09.103033.9635@pacbell.net> Date: Sun, 09 Oct 1994 10:30:33 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 10 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Anyone running this on a Quadra 840AV with the 68040? -- Takeshi Nakamura -- Pacific Bell Internet Services "They will send a copy in my place." From llopez@utexas.edu Sun Oct 09 14:27:33 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!utexas!llopez From: llopez@utexas.edu (Lucia López) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct09.142733.8906@utexas.edu> Date: Sun, 09 Oct 1994 14:27:33 GMT References: <1994Oct09.103033.9635@pacbell.net> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Oct09.103033.9635@pacbell.net>, tnakamura@pacbell.net (Takeshi Nakamura) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Lucia López *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0